secondary metabolites – Page 9

Aspergillus terreus sectorization: a morphological phenomenon shedding light on amphotericin B resistance mechanism

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When Aspergillus terreus fungi are grown in laboratory conditions for extended periods, they sometimes undergo changes that make them look different and behave differently. Scientists found that these changed strains become more susceptible to amphotericin B, a common antifungal drug. By studying the genes and proteins in both the original and changed strains, researchers discovered that special proteins called P-type ATPases appear to be responsible for the fungus’s natural resistance to this drug, offering new targets for developing better antifungal treatments.

Comparative metabolic profiling of the mycelium and fermentation broth of Penicillium restrictum from Peucedanum praeruptorum rhizosphere

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Researchers studied a fungus called Penicillium restrictum found in the roots of QianHu, a traditional Chinese medicine plant. Using advanced chemical analysis, they discovered that this fungus produces important medicinal compounds called coumarins, with peak production around day 4 of growth. The fungus appears to produce even more types of these beneficial compounds than the plant itself, suggesting it could be used to manufacture these medicines more efficiently.

Bacillus subtilis ED24 Controls Fusarium culmorum in Wheat Through Bioactive Metabolite Secretion and Modulation of Rhizosphere Microbiome

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A beneficial bacteria called Bacillus subtilis ED24 was found to effectively protect wheat plants from a destructive fungal disease called Fusarium culmorum. When applied to wheat seeds, this bacteria improved seed germination and plant growth better than a commercial chemical fungicide, while also promoting helpful microorganisms in the soil around the plant roots. The bacteria works by producing special chemical compounds that kill the harmful fungus and by enriching the soil microbiome with beneficial organisms.

Chemical clues to infection: A pilot study on the differential secondary metabolite production during the life cycle of selected Cordyceps species

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This study examined two types of parasitic fungi (Cordyceps javanica and Cordyceps blackwelliae) that infect insects, comparing how they kill their hosts and what chemical compounds they produce during infection. Researchers found that each species uses different toxic molecules to infect insects, with C. javanica being more deadly and producing diverse compounds called beauveriolides. By analyzing infected insect corpses, scientists provided the first direct evidence that these toxic compounds are actually made during real infections, not just in laboratory cultures.

Botrytis cinerea combines four molecular strategies to tolerate membrane-permeating plant compounds and to increase virulence

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Botrytis cinerea is a fungus that causes plant disease by overcoming plant chemical defenses called saponins. Researchers discovered that this fungus uses four different molecular strategies to survive saponin exposure: it breaks down saponins with an enzyme, modifies membrane structures to resist saponin damage, activates proteins that protect the cell membrane, and repairs membrane damage after it occurs. These findings explain how this fungus successfully infects plants protected by saponins and reveal new understanding of how microorganisms resist antimicrobial compounds.

Extraction and Identification of the Bioactive Metabolites Produced by Curvularia inaequalis, an Endophytic Fungus Collected in Iran from Echium khuzistanicum Mozaff

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Scientists discovered a beneficial fungus living inside the leaves of an Iranian medicinal plant. They isolated three compounds from this fungus, with the main compound showing powerful activity against drug-resistant bacteria and plant-damaging fungi. This discovery suggests that beneficial fungi within plants could be valuable sources for developing new medicines and natural pesticides.

Fungal-fungal cocultivation alters secondary metabolites of marine fungi mediated by reactive oxygen species (ROS)

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Researchers discovered that when two types of ocean fungi grow together, one of them produces a protective chemical called alternariol that can kill bacteria and cancer cells. This happens because the fungi recognize each other as competitors and trigger special stress signals that activate defensive chemical production. Interestingly, fungi from the ocean respond differently than those from land, suggesting they have evolved unique survival strategies for harsh marine environments.

Biodiversity-Driven Natural Products and Bioactive Metabolites

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This comprehensive review explores how diverse organisms like plants, fungi, and marine creatures produce remarkable chemical compounds for survival and defense. These natural products have inspired many modern medicines, but scientists now understand that the chemical diversity comes not just from the organisms themselves but from their ecological interactions and environmental challenges. By studying how these chemicals are made and what triggers their production, researchers can discover new drugs and medicines while protecting the ecosystems that generate them.

In vitro and In silico investigation deciphering novel antifungal activity of endophyte Bacillus velezensis CBMB205 against Fusarium oxysporum

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Researchers isolated a beneficial bacteria called Bacillus velezensis from medicinal plants that can fight against a dangerous fungus causing banana wilt disease. Through laboratory and computer studies, they identified two natural compounds produced by this bacteria that stop the fungus from growing by damaging its cell walls. This discovery offers a promising eco-friendly alternative to chemical fungicides for protecting banana crops worldwide.

Comparative proteomics reveals the mechanism of cyclosporine production and mycelial growth in Tolypocladium inflatum affected by different carbon sources

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Researchers studied how different sugars (fructose and sucrose) affect a fungus’s ability to produce cyclosporine A, an important drug used after organ transplants to prevent rejection. Using advanced protein analysis techniques, they found that fructose makes the fungus better at producing the drug, while sucrose makes it grow more mycelium (fungal threads). By identifying the specific proteins involved in each process, scientists can now develop better methods to produce more of this valuable medicine.

Research Topic: secondary metabolites